Stuck in traffic? Keep your windows rolled up and the A/C on. Because the air inside your car is healthier for your heart! That’s according to Taiwanese researchers. They found when people kept the air on during their commute, measurements of their cardiovascular health were as much as 32% better. That’s compared to people who rolled their windows down instead. The reason? Because the A/C filters out automobile exhaust particles, a type of pollutant that can cause a cascade of internal inflammation. And over time, the inflammation can disrupt your heart’s electrical signals, and raise your risk for a heart attack. Again – want to boost your heart health? Keep your windows closed, and the A/C on when you’re stuck in traffic.